Picture is too large in Mobile in the WooCommcerce product page

Describe the bug: The pictures in the product page (detailed description section) can not auto adapt the mobile phone. Expected behavior: Pictures should be smaller to fit the mobile. Screenshot(s):

Priority (select one):

• [x ] High - Functional blocker
• Medium - Doesn't work as expected
• Low - Not a big deal but we'd want to get to this eventually

It is a mobile phone age but the photos in the product page looks too large, is it something about the CSS?